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Organic and inorganic components in brine from the produced liquid exist during the oil exploitation stage. This appearance may trigger a "waste" issue without proper handling, whereby one of the strategies is through the filtration process. This experimental study analyses the filtration facility's performance, which compose of silica sand particle, walnut shell, and the activated carbon from the corncob waste. This study's concern indicators are temperature, pH, turbidity, phenol, ammonia, and oil-grease contents are parameters in performance assessment. Moreover, observation of the corncob activated carbon's adsorption ability on the pollutant inside the brine proves its effectiveness. The filtration experiment yields the ability to reduce turbidity and phenol content inside the produced brine for more than 90%. Another material such as ammonia and oil-grease more decrease more than 60% and 80%, respectively. The filtration product has 28oC, normal pH (around 7), and 15 NTU turbidity with residual ammonia 50 mg/L and phenol 0.03 mg/l. The addition of activated carbon material from corncob waste has a similar performance with commercial activated carbon after 3 filtration cycle. Both carbon materials can be complimented or can function as a substitute material when scarcity issues happened. [ABSTRACT FROM AUTHOR]